Final answer:
Gold coins, paper currency, digital currency, and the barter system are the different forms of money.
Step-by-step explanation:
The different forms of money include:
- Gold coins - These have been used as currency in many cultures throughout history.
- Paper currency - This is the most commonly used form of money today and is issued by governments.
- Digital currency - This includes cryptocurrencies like Bitcoin, which are stored electronically and can be used for online transactions.
- Barter system - This is a system of trade where goods and services are exchanged directly without the use of money.
These different forms of money have evolved over time and serve different purposes in different societies.